The Paradox of an Infinite Universe
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Find in video from 06:46Cosmic Expansion
The Paradox of an Infinite Universe
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Let’s Travel to The Most Extreme Place in The Universe
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Take a journey through the cosmos with us: Explore the vastness of our Solar System, the Milky Way, and beyond. From the Oort cloud to the Laniakea Supercluster, discover just how tiny we are in the grand scheme of the universe. | Kurzgesagt
1:01
Take a journey through the cosmos with us: Explore the vastness of our Solar System, the Milky Way, and beyond. From the Oort cloud to the Laniakea Supercluster, discover just how tiny we are in the grand scheme of the universe. | Kurzgesagt
37.7K viewsSep 5, 2025
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The observable universe is a big place that has been around for more than 13 billion years. Up to two trillion galaxies made up of something like 20,000 billion billion stars surround our home galaxy. When we look at these numbers, it is hard to imagine that there is nobody else out there. But before looking for our new best friends or worst enemies, we have a problem to solve: What are we actually looking for? Watch "What Do Alien Civilizations Look Like? The Kardashev Scale" now in French, Hin
0:05
The observable universe is a big place that has been around for more than 13 billion years. Up to two trillion galaxies made up of something like 20,000 billion billion stars surround our home galaxy. When we look at these numbers, it is hard to imagine that there is nobody else out there. But before looking for our new best friends or worst enemies, we have a problem to solve: What are we actually looking for? Watch "What Do Alien Civilizations Look Like? The Kardashev Scale" now in French, Hin
2.2K viewsDec 13, 2023
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How the Universe Might End
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How the Universe Might End
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The Beginning of Everything -- The Big Bang
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The Beginning of Everything -- The Big Bang
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We Found a Loophole to Survive the End of the Universe
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This Black Hole Could be Bigger Than The Universe
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Unfortunately, you won't explore the entire galaxy. And neither will the rest of the humanity. However, AI might! And it's already happening. | Kurzgesagt
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The universe is going to stop existing one day, and a fight between two titans will decide our cosmic fate. On one side of this galactic battlefield, we have all the matter in the universe; on the other side, empty space infused with dark energy. Whoever wins will destroy the universe in fun ways. But who will that be? | Kurzgesagt
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Can our universe destroy itself? Everything in the universe strives to be in the most stable state possible. For example, a ball on top of a hill is in an unstable state. When pushed, it will roll downhill, lose its potential energy and end up in a stable, ground state. The same applies to everything else in our universe... or does it? | Kurzgesagt
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Expansion and background radiation • How old is the universe? | Harald Lesch
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Could we survive the end of our Solar System? How about the end of the entire universe? Let's find out! | Kurzgesagt
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Observing the early universe would be such a fascinating and relaxing experience... or would it be? | Kurzgesagt
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Let's Make Earth Twice as Large!
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If Earth was twice as big, we'd have much more space for everyone, but we'd also have a lot more problems, too. | Kurzgesagt
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Find in video from 06:08Expanding the Energy Budget
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Gravastars could change how we think about the universe. These cosmic objects solve black holes’ biggest problems without breaking physics. From their ultra-thin shell to their energy-filled core, gravastars are both elegant and terrifying. But what exactly are they? | Kurzgesagt
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Our Sun is quite big, but its size can barely compare to some other stars out there in the universe! | Kurzgesagt
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Over 100 satellites will crash back to Earth this year, and soon there’ll be thousands. With 100,000 satellites by 2030, the skies will be crowded, and the fallout could be serious. Should we launch more or cap it now? | Kurzgesagt
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Three Ways to Destroy the Universe
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